CuSgrid.ppi

SPECIATION
  calculationType                      grid
  calculationMethod                    1
  mainSpecies                          Cu
  xmin                                 2
  xmax                                 10                  # upper pH
  ymin                                 -80.0
  ymax                                 0.0
  resolution                           100                 #
PLOT
  plotTitle                            "Cu-S-C-H<sub>2</sub>O<br>(no minerals)"
  xtitle                               pH
  ytitle                               "log <i>f </i>O<sub>2</sub>(g)"
  extraText                            "extratextCuS.dat"

CHEMISTRY

include 'ht1.inc'                                          # standard hunt and track file also works for grid plots

SOLUTION 1
   Temp      20
   pH        1.8                                           # set just below lowest pH
   units     mol/kgw
   Cu        1e-1                                          # total concns
   S(6)      1e-1
   Na        1e-1                                          # background electrolyte
   Cl        1.032e-1
END

USE solution 1                                             # loop on last simulation by default
EQUILIBRIUM_PHASES 1
   Fix_H+     -<x_axis> NaOH
     -force_equality true
   O2(g)      <y_axis>   0.1
   CO2(g)     -3.5       1.0                               # N.B. no minerals
 END